Following the death of their parents ten years ago, identical twins Glenda and Brenda were placed in an understaffed orphanage. Brenda remained in the orphanage, while Glenda was adopted by a loving middle-class couple. Which of the following would be LEAST likely to occur?

Question

Following the death of their parents ten years ago, identical twins Glenda and Brenda were placed in an understaffed orphanage. Brenda remained in the orphanage, while Glenda was adopted by a loving middle-class couple. Which of the following would be LEAST likely to occur? ​

Quizplus · Accepted Answer

The concept of reaction range suggests that genetics sets the potential range for an individual's IQ, but environmental factors determine where within that range an individual's IQ will fall. Given that Brenda remained in an understaffed orphanage, which likely provided a less stimulating and supportive environment compared to Glenda's middle-class upbringing, it is less likely that Brenda's IQ would be near the upper limit of her reaction range.

Following the Death of Their Parents Ten Years Ago, Identical